<?php


namespace app\common\controller;


class Upload
{
    public function index()
    {

        return view();
    }

    public function upload()
    {
        header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
        header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
        header("Cache-Control: no-store, no-cache, must-revalidate");
        header("Cache-Control: post-check=0, pre-check=0", false);
        header("Pragma: no-cache");

        function show_json($status = 1, $return = NULL)
        {

            $ret = array('status' => $status, 'result' => array());
            if (!is_array($return)) {
                if ($return) {
                    $ret['result']['message'] = $return;
                }
                exit(json_encode($ret));
            } else {
                $ret['result'] = $return;
            }
            exit(json_encode($ret));

        }


        if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
            exit; // finish preflight CORS requests here
        }
        if (!empty($_REQUEST['debug'])) {
            $random = rand(0, intval($_REQUEST['debug']));
            if ($random === 0) {
                header("HTTP/1.0 500 Internal Server Error");
                exit;
            }
        }

        @set_time_limit(0);

        $targetDir = 'uploads/file_material_tmp';
        $uploadDir = 'uploads/file_material/' . date('Ymd');

        $cleanupTargetDir = true; // Remove old files
        $maxFileAge = 5 * 3600; // Temp file age in seconds
        $mode = 0777; // 0777 权限

// Create target dir
        if (!file_exists($targetDir)) {
            @mkdir($targetDir, $mode, true);
            @chmod($targetDir, $mode);
        }
// Create target dir
        if (!file_exists($uploadDir)) {
            @mkdir($uploadDir, $mode, true);
            @chmod($uploadDir, $mode);
        }
// Get a file name
        if (isset($_REQUEST["name"])) {
            $fileName = $_REQUEST["name"];
        } elseif (!empty($_FILES)) {
            $fileName = $_FILES["file"]["name"];
        } else {
            $fileName = uniqid("file_");
        }
        $oldName = $fileName;
        $filePath = $targetDir . DIRECTORY_SEPARATOR . $fileName;
// $uploadPath = $uploadDir . DIRECTORY_SEPARATOR . $fileName;
// Chunking might be enabled
        $chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
        $chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 1;
// Remove old temp files
        if ($cleanupTargetDir) {
            if (!is_dir($targetDir) || !$dir = opendir($targetDir)) {
                show_json(100, 'Failed to open temp directory.');
            }
            while (($file = readdir($dir)) !== false) {
                $tmpfilePath = $targetDir . DIRECTORY_SEPARATOR . $file;
                // If temp file is current file proceed to the next
                if ($tmpfilePath == "{$filePath}_{$chunk}.part" || $tmpfilePath == "{$filePath}_{$chunk}.parttmp") {
                    continue;
                }
                // Remove temp file if it is older than the max age and is not the current file
                if (preg_match('/\.(part|parttmp)$/', $file) && (@filemtime($tmpfilePath) < time() - $maxFileAge)) {
                    @unlink($tmpfilePath);
                }
            }
            closedir($dir);
        }

// Open temp file
        if (!$out = @fopen("{$filePath}_{$chunk}.parttmp", "wb")) {
            show_json(102, 'Failed to open output stream.');
        }
        if (!empty($_FILES)) {
            if ($_FILES["file"]["error"] || !is_uploaded_file($_FILES["file"]["tmp_name"])) {
                show_json(103, 'Failed to move uploaded file.');
            }
            // Read binary input stream and append it to temp file
            if (!$in = @fopen($_FILES["file"]["tmp_name"], "rb")) {
                show_json(101, 'Failed to open input stream.');
            }
        } else {
            if (!$in = @fopen("php://input", "rb")) {
                show_json(101, 'Failed to open input stream.');
            }
        }
        while ($buff = fread($in, 4096)) {
            fwrite($out, $buff);
        }
        @fclose($out);
        @fclose($in);
        rename("{$filePath}_{$chunk}.parttmp", "{$filePath}_{$chunk}.part");
        $index = 0;
        $done = true;
        for ($index = 0; $index < $chunks; $index++) {
            if (!file_exists("{$filePath}_{$index}.part")) {
                $done = false;
                break;
            }
        }

        if ($done) {
            $pathInfo = pathinfo($fileName);
            $hashStr = substr(md5($pathInfo['basename']), 8, 16);
            $hashName = time() . $hashStr . '.' . $pathInfo['extension'];
            $uploadPath = $uploadDir . DIRECTORY_SEPARATOR . $hashName;

            if (!$out = @fopen($uploadPath, "wb")) {
                show_json(102, 'Failed to open output stream.');
            }
            if (flock($out, LOCK_EX)) {
                for ($index = 0; $index < $chunks; $index++) {
                    if (!$in = @fopen("{$filePath}_{$index}.part", "rb")) {
                        break;
                    }
                    while ($buff = fread($in, 4096)) {
                        fwrite($out, $buff);
                    }
                    @fclose($in);
                    @unlink("{$filePath}_{$index}.part");
                }
                flock($out, LOCK_UN);
            }
            @fclose($out);
            $response = [
                'success' => true,
                'oldName' => $oldName,
                'filePaht' => '/' . $uploadPath,
                'fileSuffixes' => $pathInfo['extension'],
                'hashName' => $hashName
            ];

            // 当status返回1时，为上传成功，其他则失败
            show_json(1, array('message' => '上传成功', 'info' => $response));

        }

        show_json(200, array('message' => '上传成功中'));

    }
}